text: /****************************************************************************
   * system/zmodem/rz_main.c
   *
   *   Copyright (C) 2013, 2018 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <unistd.h>
  #include <string.h>
  #include <signal.h>
  #include <fcntl.h>
  #include <termios.h>
  #include <libgen.h>
  #include <time.h>
  #include <errno.h>
  
  #include "system/zmodem.h"
  #include "zm.h"
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  static void show_usage(FAR const char *progname, int errcode)
  {
    fprintf(stderr, "USAGE: %s [OPTIONS]\n",
                    progname);
    fprintf(stderr, "\nWhere OPTIONS include the following:\n");
    fprintf(stderr, "\t-d <device>: Communication device to use.  Default: %s\n",
                    CONFIG_SYSTEM_ZMODEM_DEVNAME);
    fprintf(stderr, "\t-p <path>: Folder to hold the received file.  Default: %s\n",
                    CONFIG_SYSTEM_ZMODEM_MOUNTPOINT);
    fprintf(stderr, "\t-h: Show this text and exit\n");
    exit(errcode);
  }
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  int main(int argc, FAR char *argv[])
  {
    ZMRHANDLE handle;
    FAR const char *devname = CONFIG_SYSTEM_ZMODEM_DEVNAME;
    FAR const char *pathname = CONFIG_SYSTEM_ZMODEM_MOUNTPOINT;
    int exitcode = EXIT_FAILURE;
  #ifdef CONFIG_SERIAL_TERMIOS
    struct termios saveterm;
  #endif
    int option;
    int ret;
    int fd;
  
    /* Parse input parameters */
  
    while ((option = getopt(argc, argv, ":d:hp:")) != ERROR)
      {
        switch (option)
          {
            case 'd':
              devname = optarg;
              break;
  
            case 'h':
              show_usage(argv[0], EXIT_SUCCESS);
              break;
  
            case 'p':
              pathname = optarg;
              break;
  
            case ':':
              fprintf(stderr, "ERROR: Missing required argument\n");
              show_usage(argv[0], EXIT_FAILURE);
              break;
  
            default:
            case '?':
              fprintf(stderr, "ERROR: Unrecognized option\n");
              show_usage(argv[0], EXIT_FAILURE);
              break;
          }
      }
  
    /* Nothing else is expected on the command line */
  
    if (optind < argc)
      {
        printf("ERROR: Too many command line arguments\n");
        show_usage(argv[0], EXIT_FAILURE);
      }
  
    /* Open the device for read/write access */
  
    fd = open(devname, O_RDWR);
    if (fd < 0)
      {
        fprintf(stderr, "ERROR: Failed to open %s\n", devname);
        goto errout;
      }
  
  #ifdef CONFIG_SERIAL_TERMIOS
    /* Save the current terminal setting */
  
    tcgetattr(fd, &saveterm);
  
    /* Enable the raw mode */
  
    zm_rawmode(fd);
  
  #ifdef CONFIG_SYSTEM_ZMODEM_FLOWC
    /* Enable hardware Rx/Tx flow control */
  
    zm_flowc(fd);
  #endif
  #endif
  
    /* Get the Zmodem handle */
  
    handle = zmr_initialize(fd);
    if (!handle)
      {
        fprintf(stderr, "ERROR: Failed to get Zmodem handle\n");
        goto errout_with_device;
      }
  
    /* And begin reception of files */
  
    ret = zmr_receive(handle, pathname);
    if (ret < 0)
      {
        fprintf(stderr, "ERROR: File reception failed: %d\n", ret);
        goto errout_with_zmodem;
      }
  
    exitcode = EXIT_SUCCESS;
  
  errout_with_zmodem:
    (void)zmr_release(handle);
  
  errout_with_device:
  #ifdef CONFIG_SERIAL_TERMIOS
  #ifdef CONFIG_SYSTEM_ZMODEM_FLOWC
    /* Flush the serial output to assure do not hang trying to drain it */
  
    tcflush(fd, TCIOFLUSH);
  #endif
  
    /* Restore the saved terminal setting */
  
    tcsetattr(fd, TCSANOW, &saveterm);
  #endif
  
    (void)close(fd);
  
  errout:
    return exitcode;
  }
  